Three point charges are aligned along the x axis as shown in the figure below. Ē -0.500 m- = -4.00 nC Find the electric field at the following positions. (a) (1.40, 0) 87.991 (b) (0, 1.40) È = −10.65î – 1.4ĵ -0.800 m- 5.00 nC N/C N/C 3.00 nC x

Two spherical objects are separated by a distance of 1.52 x 103 m. The objects are initially electrically neutral and are very small compared to the distance between them. Each object acquires the same negative charge due to the addition of electrons. As a result, each object experiences an electrostatic force that has a magnitude of 2.24 x 10-20 N. How many electrons did it take to produce the charge on one of the objects? Number Units

19. If a=3.0 mm, b=4.0 mm, Q₁ = 60 nC, Q₂ = 80 nC, and q=32 nC in the figure, what is the magnitude of the electric force on q? a. b. c. d. e. 1.6 N 1.3 N 1.9 N 2.2 N 0.040 N ID: A 20. Consider an electric dipole. The size of the dipole is small relatve to a point P located at a distance z from the dipole where the electric field is E. At a distance 3 times larger, the electric field is C. 9 times weaker d. 3 times stronger a. 27 times weaker b. 3 times weaker

For the charges in the figure. Given that Q = 23 µC. Find the net electric field at point p in units of kN/C? 4 m 4 m 4 m -Q Select one: A. 13.75 B. 9.15 C. 7.08 D. 6.85

1. Four 10.0 μC charges are placed at the corners of a square that is 1.0 m on each side. What is the force on a fifth similar charge placed at the center of the square? a. 1.0 N b. 10.0 N c. 5.0 N d. 7.9 N e. 0.0 N

Two objects charged with an equal amount of charge interact with each other with a force of 4.81 Newton when separated by a distance of 16.9 cm. Determine the magnitude of the charge on each object. Answer:_______x10-6 C Enter only the coefficient of the scientific notation. For example, you'd enter just just 1.27 if you get 1.27x10-⁹.

Two objects charged with an equal amount of charge interact with each other with a force of 4.37 Newton when separated by a distance of 15.2 cm. Determine the magnitude of the charge on each object. Answer:_______x10-6 C Enter only the coefficient of the scientific notation. For example, you'd enter just just 1.27 if you get 1.27x10-⁹.

Suppose you have a glass rod with a 0.68 μC charge and a polyester cloth with a -0.61μC charge, which are 13 cm apart.   What is the magnitude of the attractive force between them (in N), using the approximation that they act like point charges? Numeric   : A numeric value is expected and not an expression. | F | = ________

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